I. Application
The equipment is designed for 132KV voltage class or below 132KV AC withstand voltage test.
It is suitable for AC withstand voltage testing for 132KV 100MVA or below 132KV 100MVA power transformer, test frequency: 45-65Hz, and DUT’s capacitance ≤23000pF, max test voltage:200KV.
II. Working envirement
1.Temperature: －15C –45C;
2.Humidity:≤90%RH;
3.Above sea level ≤2500M
III.Standard of accordance
"Electrical equipments installation project electrical equipment handover testing standards" GB50150-2006
The high-pressure resonance test device 849.6 DL/T of 2004
The reactor "GB10229.88
The electric power equipment preventive testing rules DL/T596-1996
The coupling capacitors and capacitance bleeder "IEC358 (1990)
IV. Technical Parameters
1. Rated test voltage:200KV;
Rated capacitance: 300KVA
Rated current: 1.5A
To meet 132kV 100MVA Transformer AC withstand voltage testing;
2. Output voltage waveform distortion rate: < 1.0%
3. Continuous working allowed: 60mins under rated load.
4. The device itself quality factor: Q ≥ 30 (f = 45Hz)
5. Warming up: 60mins working under rated load, ≤65K
6. Power supply: 220V/380V single phase, 50Hz
7. Frequency adjustment range: 30Hz ~300Hz
8. System measuring precision: 1.0% rms
9. Protection: over-current, over-voltage, zero startup, flashover protection.
V. Determining equipment capacitance:
1. AC withstand voltage testing for 132KV 100MVA or below 132KV 100MVA power transformer, test frequency: 45-65Hz,
and DUT’s capacitance ≤23000pF, max test voltage:200KV.
Then, Current (I) = 2πfCU试=2π×50×0.023×10-6×200×103=1.44
Corresponding Reactor’s inductance: L=1/ω2C=440H
f=1/2π√LC=1/(2×3.14×√440×0.023×10-6)=50Hz
2. According to the above mentioned,6 reactors is necessary, 50kVA/33.3kV/1.5A/73.3H each reactor.
3. Related equipment when testing:
|
Equipment Package
DUT
|
reactor
50kVA/33.3kV, 6 pics
|
Incentive transformer
output
|
|
132 kV/100MVA Power Transformer
|
6 Reactors connected in series
|
10 kV
|
VI. System configuration & technical datas
|
Sr no
|
Name
|
Specification
|
Qty
|
|
|
1
|
Control unit
|
15kW/0.22kV/0.38kV
|
1
|
unit
|
|
2
|
Transformer
|
11kVA/10kV/15kV/0.2kV/0.4kV
|
1 unit
|
|
3
|
Reactor
|
50kVA/33.3kV
|
6 unit
|
|
4
|
Divider
|
200kV/1000pF
|
1 unit
|
|
5
|
Cable
|
|
1 set
|
|
6
|
Insulating
support
|
|
1 set
|
1. Inverter power (Control unit, 1 unit):
a) Rated output capacitance：15kW
b) Power supply：220V/380V，power frequency/50Hz
c) Output voltage：0 – 400V，single phase/30~300Hz
d) Rated input current：39.4A
e) Rated output current：37.5A
f) Output waveform：Sine waveform
g) Voltage resolution： 0.01kV
h) Voltage test accuracy：0.5%
i) Frequency adjustable range：30 – 300Hz
j) Frequency adjustable resolution：≤0.1Hz
k) Frequency stabilization： 0.1%
l) Working time:60min continous under load.
m) 60mins Warming up ≤65K;
n) Noise：≤50dB
o) Size：L350mm*W250mm*H300mm
p) Weight: 15 kg
2.Incentive transformer ( 1 unit,15kVA/10kV/15kV/0.2kV/0.4kV ) :
1) Rated capacitance: 15kVA
2) Input voltage: 200V/400V, single phase 30-300Hz
3) Output voltage: 10KV; 15KV
4) Type: dry type.
5) Weight: 60kgs
3.Reactors ( 6 units ) :
a) Rated capacitance：50kVA
b) Rated voltage：33.3kV
c) Rated current：1.5A
d) Inductance：73.3H/each
e) Quality：Q≥50 (f=45Hz)；
f) Type：Dry type
g) Weight: 50kg/each
4.Capacitance Divider (1 unit, 200 kV -1000 pF)
a) Rated voltage： 200KV
b) HV capacitance：1000pF
c) Dielectric loss：tgσ≤0.15%
e) Divider ratio：1000：1
f) Accuracy：1.0%
g) Weight: 15kgs
0.1Hz VLF AC/DC Hipot tester
